@General-Cross: Which is why it's important to put down terrain in good spots. You're still 12" from middle, so if they keep back on their table edge you get to use the cover you placed. Also try and place objectives to pull them from their edge. In addition, it makes outflanking, infiltrating and scout moves more interesting and makes long range firepower better than it was in 5th, which was never really taken advantage of.

You cannot swoop with a CSM Daemon Prince, the FAQ says "models equipped with wings are jump[unit type], this is very different to the Chaos Daemons FAQ that says monstrous creatures equipped with wings are flying MCs.